What size wrench is needed for car battery screws?

[LeStephanie]

Generally, the commonly used wrench sizes for removing car batteries are 10mm, 12mm, 13mm, and 14mm. Car battery usage tips: 1. Avoid excessive use of in-car electronic devices: With the increasing number of in-car electronics, while they provide entertainment, they also increase the battery's load. Using them while driving is acceptable, but if used while parked or idling, it will inevitably increase the battery's power consumption, adding to its load and leading to battery depletion, affecting its lifespan. 2. Forgetting to turn off the air conditioning after turning off the engine: Many drivers have this habit—not turning off the air conditioning after shutting down the engine, then letting it start when the car is restarted. Unbeknownst to them, this method causes an instantaneous high power demand on the vehicle, and over time, it also wears out the battery. 3. Frequent vehicle starts in a short time: Especially in winter, when the car is hard to start, if the first attempt fails, do not rush to restart repeatedly. The interval between each start should be at least 3 seconds; otherwise, it can cause excessive battery discharge and damage.

[LaKai]

I've changed the battery myself several times and found that wrench sizes usually range from 10mm to 13mm, depending on the vehicle model. Most Japanese cars may only need a 10mm wrench, while European and American cars commonly use 13mm. Some pickups or trucks might require 17mm. Never guess—always test the size with a wrench first to avoid stripping the bolts or damaging the battery terminals. Be careful during removal: turn off the engine, disconnect the negative cable first, then the positive to prevent short circuits. Regularly checking terminal tightness during battery maintenance can prevent unexpected issues.

[StAvery]

The battery wrench is usually 10mm or 13mm, my compact car uses a 13mm one. Different brands may vary - imported cars tend to use 13mm while domestic compact cars more often use 10mm. I recommend directly measuring the bolt head size or testing with an adjustable wrench for proper fit. Safety first when removing - always disconnect negative terminal before positive, and wear insulated gloves for extra protection. Also replace depleted batteries promptly to avoid sudden vehicle starting failures.

[VonLily]

Battery terminal wrench sizes are mostly 10mm or 13mm, with some vehicles using 17mm. The key is to check the specific vehicle type—compact cars typically use 10mm, while SUVs or off-road vehicles may require 13mm or larger. Use an appropriately sized socket wrench to loosen and tighten gently, avoiding excessive force to prevent thread stripping. After inspection, promptly clean any corrosion from the terminals to maintain secure connections.